Kaustikos

Kaustikos is the transliteration of the Greek adjective καυστικός, meaning caustic, burning, or corrosive. In English, the related noun caustic and the adjective caustic are used to describe substances that can burn or corrode organic tissue, as well as remarks or humor that are sharp or biting. The term has both scientific and figurative applications.

Etymology and cognates: Kaustikos derives from the Greek kaustos, meaning burnt, which in turn comes from a root meaning to burn. The word entered scientific vocabulary through Latin causticus and later into English as caustic. In modern usage, caustic describes both chemical properties and rhetorical style.

Scientific usage: In chemistry and industry, caustic substances are highly corrosive and capable of causing chemical burns. Common examples include sodium hydroxide (caustic soda) and potassium hydroxide (caustic potash). These materials require careful handling, appropriate protective equipment, and strict safety protocols due to their reactive and hazardous nature.

Rhetorical and literary usage: Beyond chemistry, caustic describes remarks, critiques, or wit that are acerbic, incisive, and often intended to wound or challenge an idea. A caustic comment is typically sharp, sarcastic, and pointed.

See also: caustic, causticity, corrosion, alkali. The term remains in use across disciplines to convey both a physical property and a figurative severity.